6 - ELECTRON LOGIC LIGHT CHAPTER 3 3.1-3.4 3.5.1-3.5.2,...

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9/2/2006 9:43:43 AM COCO Electronic Logic (Ch. 3) 1 ELECTRON LOGIC LIGHT CHAPTER 3 3.1-3.4 3.5.1-3.5.2, 3.5.6, 3.5.7 3.6.2-3.6.2 3.7.1-3.7.4 3.10
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9/2/2006 9:43:43 AM COCO Electronic Logic (Ch. 3) 2 ACTIVE ELEMENTS Transistors come in two types , many families and two genders : Metal-oxide semiconductor field-effect transistors (MOSFET or MOS) CMOS (complementary…) logic Bipolar junction transistors: BJT TTL logic NMOS and PMOS (n-channel and p-channel) NPN and PNP (pnp is seldom used: it needs – voltage source) We consider only positive logic (1 is HIGH, 0 is LOW) voltage
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9/2/2006 9:43:43 AM COCO Electronic Logic (Ch. 3) 3 CMOS: COMPLEMENTARY SWITCHES CMOS transistors are almost always married and appear in pairs. One is on (conducting) and the other is off (open). This reduces voltage and current fluctuations elsewhere. They act like a remote-controlled switch (or, more exactly, like a remote-controlled resistor that has either a very high resistance (several Megohms) or very low resistance (< 1 Kohm). When they are on, the current flows from source to drain or vice-versa . The control voltage is applied to the base . So CMOS devices have 3 terminals .
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9/2/2006 9:43:43 AM COCO Electronic Logic (Ch. 3) 4 A CMOS couple The arrows always point from positive to negative, because that is the way the current flows. PMOS NMOS
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COCO Electronic Logic (Ch. 3) 5 ORIENTATION in CIRCUIT OK NEVER SELDOM Arrow indicates that current flows from +V to 0. You can flip the gates left to right, but not upside down
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This homework help was uploaded on 04/22/2008 for the course ECSE 2610 taught by Professor Ji during the Spring '08 term at Rensselaer Polytechnic Institute.

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6 - ELECTRON LOGIC LIGHT CHAPTER 3 3.1-3.4 3.5.1-3.5.2,...

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